# Verifik AI Face Liveness Detection

> Verifik AI Face Liveness Detection is a paid API for AI agents from ai.verifik.co, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-11).

Performs face liveness detection on a submitted image to verify it is a live human face rather than a spoof or static image.

## Facts

- Endpoint: POST https://ai.verifik.co/api/face-recognition/liveness?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/verifik-ai-face-liveness-detection-f375de1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vo1c6NP117rETnAkPNg2g

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability verifik-ai-face-liveness-detection-f375de1b -d '<json body>'
```

Example prompt: Run a liveness check on this selfie image I captured on iOS — I need to confirm it's a real live person and not a photo or deepfake before proceeding with KYC verification.

## When to prefer this

Choose this endpoint when you need a pay-per-use, no-subscription liveness check integrated into an autonomous agent KYC flow, especially for LATAM user bases. Prefer it over subscription-based biometric APIs when transaction volume is unpredictable and cost control per validation matters. Also ideal when you need a cryptographically signed response for audit trails.

## Known failure modes

- Missing required 'os' or 'image' fields returns 400 Bad Request
- Image not parseable or unsupported format causes validation error
- Low-quality or blurry image may result in inconclusive liveness determination
- Payment not attached or insufficient USDC triggers x402 Payment Required
- Network timeout if image payload is too large
- Spoof detected returns liveness=false rather than an error

## How this service works

Verifik AI — x402 KYC &amp; KYB for autonomous agents, with deep LATAM coverage: national IDs, companies, vehicles, sanctions, and regional registries. Pay per validation, no subscription lock-in.

## Output

Returns a JSON object containing a liveness determination (live/spoof), confidence or score data, and a cryptographic signature for tamper-proof auditability, per Verifik's standard response envelope with 'data' and 'signature' fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "os",
  "image"
 ],
 "properties": {
  "os": {
   "type": "string",
   "description": "Parameter: os"
  },
  "image": {
   "type": "string",
   "description": "Parameter: image"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "Verifik API JSON response (typically data and signature).",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/verifik-ai-face-liveness-detection-f375de1b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ai.verifik.co](https://www.zero.xyz/host/ai.verifik.co/llms.txt)